TY  - BOOK
AU  - Lal, J.B.
TI  - Environmental conservation
U1  - 333.72 21st ed.
PY  - 1987///
CY  - Dehradun
PB  - International Book Distributors
KW  - Conservation
KW  - Energy
KW  - Environment
KW  - Environmental control
KW  - Land
KW  - Pollution
KW  - Water
ER  -